15389939 has 2 divisors, whose sum is σ = 15389940. Its totient is φ = 15389938.

The previous prime is 15389909. The next prime is 15389953. The reversal of 15389939 is 93998351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15389939 - 2¹⁶ = 15324403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15389893 and 15389902.

It is not a weakly prime, because it can be changed into another prime (15389909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7694969 + 7694970.

It is an arithmetic number, because the mean of its divisors is an integer number (7694970).

Almost surely, 2^15389939 is an apocalyptic number.

15389939 is a deficient number, since it is larger than the sum of its proper divisors (1).

15389939 is an equidigital number, since it uses as much as digits as its factorization.

15389939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 47.

The square root of 15389939 is about 3923.0012745346. The cubic root of 15389939 is about 248.7400016183.

The spelling of 15389939 in words is "fifteen million, three hundred eighty-nine thousand, nine hundred thirty-nine".